Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/2dd9eb25994b
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #10650 from borjasalguero/regression_counter

Bug 887615 - [SMS] [Regression] Character counter is broken. r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/2965a838d7d9
Author: borjasalguero <fbsc@tid.es>
Desc: Bug 887615 - [SMS] [Regression] Character counter is broken. r=schung